Live roller feed table with ejecting means



United States Patent Inventor Otto Karl Buchheit 2 Eulentalstn, 667 St.lngbert-Saar, Germany Appl. No. 762,944 Filed Sept. 26, 1968 PatentedDec. 22, 1970 Priority Sept. 30, 1967 Germany No. 1,602,217

LIVE ROLLER FEED TABLE WITH EJECTING MEANS 4 Claims, 3 Drawing Figs.

198/127: 214/1 1111. C1. ..B65g 39/00, 865g 47/52 Field of Search198/24, 127, l88;2l4/1P2; 74/109 [56] References Cited UNITED STATESPATENTS 2,057,131 10/1936 Barton et a1. 198/24X 3,245,271 4/1966 Roberts74/109 3,430,749 3/1969 Ferrari 198/24 Primary ExaminerRobert G.Sheridan Attorney-John J. Dennemeyer I ll 11 I ll enawmvamae I II M I ILIVE ROLLER FEED TABLE WITH EJEC'IING MEANS The invention concerns alive roller feed table with a device for periodically ejectingcontinuously fed rolled elongate material, such as rolled bars and rods.This live roller feed table can be used in connection with a cooling bedas well as a cooling pit. I V

The usual device for periodically ejecting rolled elongate material"consisting of base plates adapted 'to be raised or lowered, so-calledbrake slides, cannot beused when operat ing with high rolling speeds andextremely short bar lengths, thus a shorter bar sequence, due toextremely high switching frequencies and relatively high inertia forceswhich result in excessively high acceleration values; "Accordingly theinvention consists of a live roller feed table with ejectors that aremovable transversely to the feeding direction, such as straight edges orspaced wipers pivoting around vertical shafts. Similar to the known baseplates that are raised and lowered, the ejectors are connected to acommon linkage mechanism which, through .a fast switching reversiblepositioning drive having a linearly moving positioning link, is able toimpart a longitudinal back and forth motion to these ejectors.

It will be understood that the reversible positioning drive withlinearly movable positioning link could be, forexample, a hydraulic orelectromagnetic servomotor. However, even with these reversiblepositioning drives, extreme feed conditions rod is connected to thelinkage mechanism and rotates in one working cycle the crank gearthrough 36 360. Thus the link age mechanism will be moved forward-andback again through one cycle of the positioning drive. Appropriately,thefull revolution of the crank starts from a deadcenter position of thecrank gear as this is best adapted to the acceleration conditionsresulting from the sinusoidal displacement of the linkage mechanism. Itis particularly" advantageous to use a reciprocatingpiston-rotary driveas positioning drive whose rack stroke matches the pitch circumferenceof the pinion driving the crank. As positioning drive one could alsoconsider a normal hydraulic motor with a double acting piston or anelectromagnetic drive, and in both cases the piston or adjusting rodshould incorporate a rack. It is pointed out that double-arm rotatingwipers for live roller feed tables are known. They are mounted in frontof the live roller feed table on a drive shaft extending parallelthereto. The drive shaft with the ejectors must be rotated by l80forevery ejection and this must be clone without changing the direction ofrotation. For this operation one requires either an expensive motor foran extremely high switching frequency with'a brake installation tomaintain the lS0-rotation, or a continuous speed motor with a magneticparticle clutch whose switching frequency is nevertheless alsorestricted since two switching operations are needed for each workingcycle, namely start and stop. The live roller feed table, according tothis invention, is not subject to these restrictions because only onestart command is required and the motion of the linkage mechanism ispositively stopped at the end of the stroke. A reversing is merelyrequired from one bar to the next.

The features and advantages of the invention will further appear fromthe following description made in reference to the accompanying drawingsshowing an embodiment of a live roller feed table. In the drawing:

H6. 1 is a plan view of the entire live roller feed table;

FIG. 2 is an enlarged plan view according to FIG. 1 with a sectionalview of a reciprocating piston-rotary drive; and

FIG 3 is a cross section of the'live roller feed table with an adjacentcooling pit.

The live roller feed table located behind rotary shears 10 consists offixed base plates 11 between which protrude sloping rollers 12 of theroller track. The feeding channel thus pro vided is limited along oneside by vertical partition walls Ila between which are mounted onvertical shafts l4 wipers l3 pivoted transversely to the feedingdirection; In their fully ex tended position shown in FIG. 2 the wipersl3 supplement the vertical partition walls to constitute a continuouslateral limit of the feed channel.

The ejectors l3 consist of double-arm levers with lever arms which areinterconnected by a common linkage mechanism 15. When the linkage 15 isaxially displaced the wipers 13 move into the dotted line position 13'and the levers 13a move into the dotted line position 13a. Due to thismotion a bar travelling on the fixed base plates will be ejectedlaterally, reaches an angularly adjustable slide plate 17, and as shownin the embodiment illustrated it slides from there into a cooling pit 18(FIG. 3). A straightening plate system of a cooling rake bed can beconnected laterally'to the live roller feed table instead of the slideplate 17. The bed of the cooling rake can also be mounted laterally tothe adjustable slide plate 17 because its slope can be set in such a waythat after passing over the slide plates 17 the bars come to a rest atits left extremity.

The invention is directed to the positioning drive for the linkagemechanism 15. This positioning drive consists of a reciprocatingpiston-rotary drive 20 having a rack piston 21 which is adjustableforward and backward and which meshes with a pinion 22. The stroke ofthe rack piston 21 matches the pitch circumference of the pinion 22 sothat it rotates through a complete revolution when the rack piston 21moves from one end position to the other end position.

A crank arm 24 with a crankpin 25 is mounted on the pinion shaft 23. Alinkage rod 26 connects the crank pin to the linkage joint 27 of a firstlever arm 13a from-which the linkage mechanism 15 begins. This linkagemechanism will be actuated back and forth during one working cycle ofthe reciprocating piston-rotary drive 20 whereby all the ejectors 13will move into position 13' and back again, because the crank pin 25makes one complete revolution during each forward stroke of the rackpiston 21. In the illustrated end position of the ejectors 13 the crankpin 25 is located in a dead center position.

Iclaim:

I. An elongate material ejection device for a live roller feed table ofthe type having base plates and rollers for advancing said elongatematerial along said base plates in a feeding direction comprising, incombination, a plurality of pivotally mounted ejectors supportedadjacent said base plates in longitudinally spaced relationship forpivotal movement transversely to said feeding direction to eject saidadvancing elongate material from said base plates, a linkage mechanismconnected to ejectors for simultaneous movement of all said ejectors,reversible, positioning drive means connected to said linkage mechanism,said drive means being movable in one direction to move said linkagemechanism reciprocally for said pivotal movement of said ejectors backand forth transversely to said feeding direction for ejection of saidelongate material from said base plates, said drive-means being movablein the other, reverse direction to similarly reciprocate said linkagemechanism for said pivotal movement of said ejectors back and forth forejection of said advancing elongate material from said base plates. j

2. An ejection device in accordance with claim I, wherein said drivemeans includes a rotatable crank, means for connecting said crank tosaid linkage mechanism, and reversible means for rotating said crank,said crank rotating means being arranged to rotate said crank for onerevolution in each of said directions for said back and forth movementsof said ejectors.

3. An ejection device in accordance with claim 2 wherein said reversiblemeans includes a piston arranged for reciprocating movement and meansfor drivably connecting said piston to said crank.

4. An ejection device in accordance with claim 3 wherein said means fordrivably connecting said piston to said crank includes a pinion gearmounted on said crank, a rack mounted on said piston for meshingengagement with said pinion gear, said piston having a stroke for onecomplete revolution of said UNI'IEI) S'IA'IES lA'll'lN'l ()FFHII".CERTIFICATE OF CORRECTION December 22, 1970 Patent No. 3 n 548 997 DatedInventor(s) Otto Karl he 1t It is certified that error appears in theabove-identified patent and that said Letters Patent: are herebycorrected as shown below:

On the cover sheet insert [73] Assignee: Moeller G Neumann G.m.b.H.Ingbertl Saar,

Germany Signed and sealed this 1st day of October 1974.

(SEAL) Attest:

McCOY M. GIBSON JR. C. MARSHALL DANN Attesting Officer Commissioner ofPat:

